Table 1 Demographic Characteristics of the Domestic Gas Workers and Staff of Works Department (n = 100)
Variable | f (%) / Mean ± SD / Median [Range] | M.D | χ2 / | p-value | ||
|---|---|---|---|---|---|---|
Total (n = 100) | DGW (n = 50) | SWD (n = 50) | t-score | |||
Gender | ||||||
 Male | 84 (84) | 42 (84) | 42 (84) | – | 0.001a | 1.000 |
 Female | 16 (16) | 8 (16) | 8 (16) | – |  |  |
Age (years) | 31.95 ± 8.80 | 31.74 ± 8.24 | 32.16 ± 0.60 | −0.42 | −0.360b | 0.720 |
Height (m) | 1.70 [0.23] | 1.70 [0.18] | 1.70[0.23] | – | – | 0.233 |
Weight (kg) | 76.34 ± 8.29 | 74.36 ± 9.11 | 78.32 ± 6.91 | −3.96 | −2.448b | 0.016* |
BMI (kg/m2) | 25.66 [18.01] | 25.37 [18.01] | 25.95 [14.68] | – | – | 0.023* |
SBP (mmHg) | 120.00 [50.00] | 110.00 [40.00] | 120.00 [50.00] | – | – | 0.002* |
DBP (mmHg) | 79.00 [30.00] | 74.00 [35.00] | 80.00 [30.00] | – | – | 0.443 |
RR (cpm) | 22.00 [12.00] | 22.50 [7.00] | 21.50 [12.00] | – | – | 0.105 |
RHR (bpm) | 74.00 [78.00] | 74.00 [35.00] | 73.00 [68.00] | – | – | 0.675 |
Duration of service (years) | 2.00 [39.92] | 1.75 [39.92] | 5 [39.50] | – | – | < 0.001* |
Work duration (hours/day) | 8.00 [8.00] | 10.00 [7.00] | 8.00 [2.00] | – | – | < 0.001* |
Sleep duration (hours/day) | 6.00 [2.00] | 6.00 [1.00] | 5.00 [2.00] | – | – | 0.859 |